Note: Should the Remote System Explorer not be installed yet, you may do so at Help - Install New Software... - --All Available Sites-- (from the Work with: drop-down menu) - Mobile and Device Development or General Purpose Tools - Remote System Explorer.

The debug perspective provides information and useful features in many different places:

There are buttons in a play/pause fashion in the top of the window. They are responsible for controlling the flow of the code, along with the breakpoints.

The Debug tab displays the application status - running or suspended and in which line of the source-code it is, for instance. You can easily verify and run the disassembled code, instruction by instruction, by clicking the Instruction Stepping Mode.

In the Console tab, everything printed to the stdout, such as when using functions like printf, will be displayed.

The Variables tab displays the application variables and their current status.

The Breakpoints tab lists all the breakpoints added and allows for quickly enabling/disabling them.

The picture below presents the debug perspective when it is started. The program will be halted in the first line of the main function.
Take some time to get used to this perspective:

Keep pressing F5 while looking at the Variables tab. The values of i and mul will change as the for loop is executed.
The last line to be executed is the return EXIT_SUCCESS;. By then, the Variables tab should look like this: